Event mask register (EXTI_EMR)
| MR0 | Event Mask on line 0 |
| MR1 | Event Mask on line 1 |
| MR2 | Event Mask on line 2 |
| MR3 | Event Mask on line 3 |
| MR4 | Event Mask on line 4 |
| MR5 | Event Mask on line 5 |
| MR6 | Event Mask on line 6 |
| MR7 | Event Mask on line 7 |
| MR8 | Event Mask on line 8 |
| MR9 | Event Mask on line 9 |
| MR10 | Event Mask on line 10 |
| MR11 | Event Mask on line 11 |
| MR12 | Event Mask on line 12 |
| MR13 | Event Mask on line 13 |
| MR14 | Event Mask on line 14 |
| MR15 | Event Mask on line 15 |
| MR16 | Event Mask on line 16 |
| MR17 | Event Mask on line 17 |
| MR18 | Event Mask on line 18 |
| MR19 | Event Mask on line 19 |
| MR20 | Event Mask on line 20 |
| MR21 | Event Mask on line 21 |
| MR22 | Event Mask on line 22 |
| MR23 | Event Mask on line 23 |
| MR24 | Event Mask on line 24 |
| MR25 | Event Mask on line 25 |
| MR26 | Event Mask on line 26 |
| MR27 | Event Mask on line 27 |
| MR28 | Event Mask on line 28 |